If that flight started tomorrow, yes the pay would be the same as the 777. Continental pays all widebody aircraft at the same rates(777,764,762). By the time that aircraft flies in Continental's colors, the name on the side will be United, and the contract governing pilot pay will be new. I would imagine the pay will be almost the same or within a few bucks an hour to that in which the 777 will be paying on the new contract(hopefully something North of $225.00 an hour).
I would doubt neither the contract nor the paint job will be done by then.